Complete the following statement: Most of the heat that is lost to space from the earth occurs by O conduction. O convection. O Option 6 O radiation. O both conduction and radiation. O both conduction and convection.The specific heat capacity of iron is approximately half that of aluminum. Two balls of equal mass, one made of iron and the other of aluminum, both at 90 C, are dropped into a thermally insulated jar that contains an equal mass of water at 25 0C. Thermal equilibrium is eventually reached. Which one of the following statements concerning the final temperatures is true? The difference in the final temperatures of the balls depends on the initial temperature of the water. Both balls will reach the same final temperature. The iron ball will reach a higher final temperature than the aluminum ball. The aluminum ball will reach a higher final temperature than the iron ball. The difference in the final temperatures of the balls depends on the initial mass of the water. OOOOO Which one of the following objects, all initially at the same temperature, will be most efficient in losing heat? 0 a polished silver box in vacuum 0 a dull black box in air 0 a box with an emissivity of 0.1 O a dull black box in vacuum I O a polished silver box in air The shear modulus of steel is 8.1 * r x 10'10 N/m2. Asteel nail of radius 0.05 cm projects 3.50 cm horizontally outward from a wall. A man hangs a wet raincoat of mass 4.0 kg from the end of the nail. Assuming the wall holds its end of the nail, what is the vertical deflection of the other end of the nail? O 2.1x10-5m O 1.8x10-3m O 2.15x10-5m O 4.2x10-4m O 7.9x106m The units of heat are equivalent to those of which one of the following quantities? power force/time temperature work OOOOO specific heat capacity A metal sphere of radius 3.28 ft is taken from the surface to the deep part of the sea where the pressure is 1000 atm. What is the volume of the sphere at the bottom of the sea? B = 4.2 x 10"1O N/m2 * _ * l